Senior Backend Engineer (NXJ-24)

Python

Senior Backend Engineer (NXJ-24)

Python
Skierniewicka 10A, Warszawa

Newxel

Full-time
B2B
Senior
Remote

Job description

We are looking for a driven, self-motivated Senior Backend Engineer (Python) who strongly desires to achieve our partner’s growth goals. In this role, you will partner with BE, FE, QA, and Product to build tools and features to help fight the ever-growing problem of cybercrime.

If you love a fast-paced, rewarding challenge, hungry to chase down answers, join this rapidly growing team today!


Responsibilities


  • Innovate and evolve cutting-edge AI-powered Email security platform

  • Collaborate with Product and Engineering teams to understand roadmap priorities

  • Carry feature requirements from an early phase to full implementation

  • Design and develop new capabilities in a dynamic and changing environment

  • Build a high-performance and highly available platform and design new prototypes

  • Write Python code focused on scalability, testability, supportability and maintainability

  • Utilize Machine Learning capabilities

  • Participate in architecture, code, security and operational reviews

  • Contribute to ongoing strategic planning and design of future features


Requirements


  • A minimum of 6 years of hands-on backend development experience, including at least 3-4 years with Python (Django/SqlAlchemy/FastAPI experience is an advantage)

  • Proven experience in the design and implementation of robust and scalable products, demonstrating a commitment to quality

  • Proficiency with both SQL and NoSQL databases (PostgreSQL, VectorDB)

  • Experience with LLM and AI Models

  • Extensive experience with cloud platforms, preferably AWS

  • Experience in writing services/systems from scratch

  • Experience in cloud architecture (with various managed services like SQS, SNS, EKS, SES, S3, etc)

  • Demonstrated ability to manage requirements from the early phases through to full implementation, taking end-to-end ownership of projects

  • Experience in mentorship


What we offer


  • Competitive salary and benefits package

  • Medical insurance

  • Top equipment kit

  • Full Remote

  • Collaborative and innovative work environment

  • Career growth and development opportunities

  • A chance to work with a talented and driven team of professional


About the project


A worldwide anti-phishing company introduces an AI-powered Email security platform that provides an innovative solution to prevent fraud and email attacks. With the help of the Israel Defence Forces and a top incubator program, this award-winning platform helps prevent and block any attacks in the fastest way. The company provides all types of businesses with a complete solution against any kind of phishing attack in the mailbox.

Tech stack

    English

    B2

    Python

    master

    AI models

    advanced

    LLMs

    advanced

    Django

    nice to have

    fastapi

    nice to have

    SQLAlchemy

    nice to have

    PostreSQL

    nice to have

    VectorDB

    nice to have

    AWS

    nice to have

Office location

Published: 09.01.2026

Senior Backend Engineer (NXJ-24)

Summary of the offer

Senior Backend Engineer (NXJ-24)

Skierniewicka 10A, Warszawa
Newxel
By applying, I consent to the processing of my personal data for the purpose of conducting the recruitment process. Informujemy, że administratorem danych jest Newxel LTD, spółka zarejestrowana zgodnie z prawem Cypru pod numerem rejestracyjnym HE 367... MoreThis site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.